Jin Rong Jie·2025-05-10 02:24Group 1 - China National Petroleum Corporation (CNPC) has applied for a patent titled "Operating Equipment and Control Method Based on Ultra-Long Stroke Pump" with publication number CN119933613A, filed on November 2023 [1] - The patent describes a system that includes an oil extraction system with a motor connected to a drum, which is wound with a flexible rod, and features a wheel that supports an oil pipe column [1] - The system incorporates two energy-saving systems symmetrically mounted on the wheel's central axis, designed to facilitate the upward and downward movement of the flexible rod, thereby reducing external energy consumption during oil extraction [1] Group 2 - CNPC was established in 1999 and is based in Beijing, primarily engaged in gas production and supply [2] - The company has a registered capital of 18,302,097 million RMB and has invested in 1,279 enterprises [2] - CNPC has participated in 508 bidding projects and holds 33 trademark records and 5,000 patent records, along with 168 administrative licenses [2]